O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Rectangular O-Ring Material PTFE Durometer (Hardness) Rating Very Hard Nominal Inside Dia 1 1/64 in Actual Inside Dia 1.016 in Actual Width 0.119 in Color White Durometer 55 Shore D Actual Outside Dia 1.254 in Temp Range -100 Degrees to 500 Degrees F FDA Approved Yes Package Quantity 50